VB.NET String Function Left()
Posted by asp.net videos on Saturday, February 5, 2011 · Leave a Comment
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VB.NET Left Example – Code Sample Syntax
Abstract: – Illustrates using VB.NET Left Code Example.
*** 2. Left Syntax ***
Purpose:
Returns a string containing a specified number of characters from the left
side of a string.
Syntax:
Left(str As String, Length As Integer) As String
Parameters |
Description |
str |
Required – String expression from which characters will be returned.
|
Length |
Required – Specifies number of characters to return.
|
Result Data Type |
Description |
string |
Returns a string containing a specified number of characters from the left
side of a string.
|
*** 3. Left – Quick Example ***
|
Console.WriteLine(Left(“Ideal Programmer”, 5)) ‘ Returns Ideal
|
*** 4. Left – Full Example ***
Left Example Output Screenshot
Step 1: Click Visual Basic to Cut-n-paste code into clsLeft.vb
Public Class clsLeft
Public Sub Main()
'****************************************************************************************
' Purpose: Returns a string containing a specified number of characters from the left
' side of a string.
'
' Syntax: Left(str As String, Length As Integer) As String
'
' Parameter1: str - Required - String expression from which characters will be returned.
'
' Parameter2: Length - Required - Specifies number of characters to return.
'
' Result: string - Returns a string containing a specified number of characters from the left
' side of a string.
'
' Quick Example: Console.WriteLine(Left("Ideal Programmer", 5)) ' Returns Ideal
'
'****************************************************************************************
Console.WriteLine("Example #1: Left(str As String, Length As Integer) As String")
Console.WriteLine(Left("Ideal Programmer", 5)) ' Returns Ideal
'write blank line to make output easier to read
Console.WriteLine()
'Prevent console from closing before you press enter
Console.ReadLine()
End Sub
End Class |
Public Class clsLeft
Public Sub Main()
'****************************************************************************************
' Purpose: Returns a string containing a specified number of characters from the left
' side of a string.
'
' Syntax: Left(str As String, Length As Integer) As String
'
' Parameter1: str - Required - String expression from which characters will be returned.
'
' Parameter2: Length - Required - Specifies number of characters to return.
'
' Result: string - Returns a string containing a specified number of characters from the left
' side of a string.
'
' Quick Example: Console.WriteLine(Left("Ideal Programmer", 5)) ' Returns Ideal
'
'****************************************************************************************
Console.WriteLine("Example #1: Left(str As String, Length As Integer) As String")
Console.WriteLine(Left("Ideal Programmer", 5)) ' Returns Ideal
'write blank line to make output easier to read
Console.WriteLine()
'Prevent console from closing before you press enter
Console.ReadLine()
End Sub
End Class
Step 2: Click Visual Basic to Cut-n-paste code into Module1.vb
Module Module1
Sub Main()
Dim myclsLeft As New clsLeft
myclsLeft.Main()
End Sub
End Module |
Module Module1
Sub Main()
Dim myclsLeft As New clsLeft
myclsLeft.Main()
End Sub
End Module
Prerequistes:
- Install Visual Basic (Express or Standard Edition)
- Install SQL Server Express
- Download Northwind and pubs Database
- Attach Northwind Database to Databases in Sql Express
- Attach pubs Database to Databases in Sql Express
Notes:
- Console Application is used to simplify things, but Windows Forms or Web Forms could also be used
- You can build a library of syntax examples by using same project over and over and just commenting out what you do not want to execute in Module1.vb
Instructions:
- Use Visual Basic 2010 Express or Standard Edition
- Create new project;
- Click File/New Project
- Select Console Application Template
- Select Visual Basic for Language
- name of project could be VBNET_Syntax.
- Add New folder named “StringManipulation”
- Right-click project name in solution explorer;
- add new folder;
- name of folder could be: StringManipulation
- Add Class Named clsLeft to StringManipulation folder
- Right-click StringManipulation folder;
- add new item;
- Select class
- Class name could be clsLeft
- Click on Visual Basic in code in step 1 above to copy code into clsLeft.vb
- Click on Visual Basic in code in step 2 above to copy code into Module1.vb
- Click green arrow or press F5 to run program
|